roll

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roll,

in aviation: see airfoilairfoil,
surface designed to develop a desired force by reaction with a fluid, especially air, that is flowing across the surface. For example, the fixed wing surfaces of an airplane produce lift, which opposes gravity.
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roll

[rōl]
(geology)
A primary sedimentary structure produced by deformation involving subaqueous slump or vertical foundering.
(mechanics)
Rotational or oscillatory movement of an aircraft or similar body about a longitudinal axis through the body; it is called roll for any degree of such rotation.
(mechanical engineering)
A cylinder mounted in bearings; used for such functions as shaping, crushing, moving, or printing work passing by it.
(mining engineering)
(textiles)
A continuous strand made by rolling, rubbing, or twisting fibers.

roll

1. A rounded strip fastened to, and running along, the ridge of a roof.
2. In a roof covered

roll

rollclick for a larger image
The motion of an aircraft about its longitudinal axis. The rolling motion is controlled primarily by ailerons.

roll

1. a cylinder used to flatten something; roller
2. a very rapid beating of the sticks on a drum
3. a flight manoeuvre in which an aircraft makes one complete rotation about its longitudinal axis without loss of height or change in direction
4. a throw of dice
5. a bookbinder's tool having a brass wheel, used to impress a line or repeated pattern on the cover of a book
References in periodicals archive ?
To test the stability of cortisol in the cotton at room temperature and during storage in a refrigerator or freezer for periods of up to 3 days, we absorbed known amounts of saliva on the cotton rolls in syringes, closed the syringes, and stored them in the dark.
One may not think you can save that much on discount articulating paper or dental cotton rolls, but the cumulative savings are impossible to ignore.
Each box contained three 25-mL plastic pill-cups filled with wet cotton rolls (1 cm diameter, 3.
It consisted of 40 cotton rolls, each around fourto-five feet high and between three-tofour feet in diameter.